uair: return exit code 1 on failure

closes #17

CHANGELOG.md

@@ -4,6 +4,10 @@
 
 - New `uairctl` flag for `listen` subcommand: `-e` or `--exit`. Allows to output remaining time and exit the listening instance immediately.
 
+### Fixed
+
+- `uair` now returns exit code 1 on failure.
+
 ### v0.6.1
 
 #### Fixed

docs/uair.5.scd

@@ -40,12 +40,6 @@ The number of pomodoro sessions and their properties can be specified by an uair
 *command*
 	Command which is run when the session finishes. See COMMAND ENVIRONMENT section for information on environment variables which are passed to the command.
 
-*before*
-	String which is printed before the remaining time string. (Deprecated)
-
-*after*
-	String which is printed after the remaining time string. (Deprecated)
-
 *format*
 	Specifies the format in which text is printed each second. See FORMAT SPECIFIERS section for details.
 

src/bin/uair/main.rs

@@ -6,6 +6,7 @@ mod timer;
 
 use std::env;
 use std::io::{self, Write};
+use std::process::ExitCode;
 use uair::get_socket_path;
 use argh::FromArgs;
 use futures_lite::{FutureExt, StreamExt};
@@ -14,7 +15,7 @@ use signal_hook::consts::signal::*;
 use signal_hook_async_std::Signals;
 use crate::app::App;
 
-fn main() {
+fn main() -> ExitCode {
 	let args: Args = argh::from_env();
 	if args.version {
 		_ = write!(
@@ -23,7 +24,7 @@ fn main() {
 			env!("CARGO_PKG_NAME"),
 			env!("CARGO_PKG_VERSION"),
 		);
-		return;
+		return ExitCode::SUCCESS;
 	}
 
 	let enable_stderr = args.log != "-";
@@ -33,14 +34,19 @@ fn main() {
 		Err(err) => {
 			error!("{}", err);
 			if enable_stderr { eprintln!("{}", err) }
-			return
+			return ExitCode::FAILURE;
 		}
 	};
 
 	if let Err(err) = async_io::block_on(app.run().or(catch_term_signals())) {
 		error!("{}", err);
-		if enable_stderr { eprintln!("{}", err) }
+		if enable_stderr {
+			eprintln!("{}", err);
+			return ExitCode::FAILURE;
+		}
 	}
+
+	return ExitCode::SUCCESS;
 }
 
 #[derive(FromArgs)]